Josephson tunnel junctions with ferromagnetic $\Fe_{0.75}\Co_{0.25}$ barriers

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dc.creatorSprungmann, D.
dc.creatorWesterholt, K.
dc.creatorZabel, H.
dc.creatorWeides, M.
dc.creatorKohlstedt, H.
dc.date2009-05-06
dc.date.accessioned2026-07-07T13:12:12Z
dc.date.available2026-07-07T13:12:12Z
dc.descriptionJosephson tunnel junctions with the strong ferromagnetic alloy $\Fe_{0.75}\Co_{0.25}$ as the barrier material were studied. The junctions were prepared with high quality down to a thickness range of a few monolayers of Fe-Co. An oscillation length of $ξ_{F2}\approx 0.79\:{\rm {nm}}$ between 0 and $π$-Josephson phase coupling and a very short decay length $ξ_{F1}\approx 0.22\:{\rm {nm}}$ for the amplitude of the superconducting pair wave function in the Fe-Co layer were determined. The rapid damping of the pair wave function inside the Fe-Co layer is caused by the strong ferromagnetic exchange field and additional magnetic pair breaking scattering. Josephson junctions with Fe-Co barriers show a significantly increased tendency towards magnetic remanence and flux trapping for larger thicknesses $d_{F}$.
dc.descriptioncontains 5 figures
dc.identifierhttps://arxiv.org/abs/0905.0761
dc.identifierhttp://arxiv.org/abs/0905.0761
dc.identifierJ. Phys. D: Appl. Phys. 42 (2009) 075005
dc.identifierdoi:10.1088/0022-3727/42/7/075005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229515
dc.subjectSuperconductivity
dc.titleJosephson tunnel junctions with ferromagnetic $\Fe_{0.75}\Co_{0.25}$ barriers
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